zSeries, Sub-Capacity Workload License Charges, Soft-Caps, and WLM. Richard S. Ralston Humana, Inc. Contents. What is Sub-Capacity License Charges Tools Observations and Behaviors Managing the LPAR Defined Capacity Benefits Conclusions/Results References Contact Info.
Richard S. Ralston
Sample Report: SCRT1B
Used to override IBM SCRT reports.
To find the LPAR’s Hardware MSUs use the Ratio equation:
Average prime shift HW MSU Usage
Daily amount of time running soft-capped
Monthly SW MSU usage projection
The LPAR Defined Capacity (soft-cap) is set at the Hardware Management Console
1. Make sure you are logged on the HMC as SYSPROG
2. In the Views pane (top left) select the Groups icon
3. In the bottom left pane select the Defined CPC’s icon
4. Highlight the desired CPC. Note: Only one CPC can be highlighted at a time to correctly change LPAR settings.
5. Rotate the right panel to the CPC Operational Customization panel
6. In the right panel select the Change LPAR Controls icon
7. Change the desired settings, specifically the soft-cap values
8. Select the Save and Change button to place the new soft-cap in effect
9. Un-highlight the CPC in the lower left pane
10. Repeat steps 4 through 9 for each CPC
1. Make sure the required APARs are installed (SCRT web site).
2. Download and install the Sub-Capacity Planning Tool.
3. Run the tool against several days of RMF data.
4. Determine that the actual system usage is typically below the CPC capacity.
5. Identify the LPAR Defined Capacity values for your LPARs. Initially, make these values 2-3% below the CPC capacity.
6. Follow the steps previously identified to set the LPAR Defined Capacities.
7. Monitor LPAR and workload behaviors, back out and quit if there is a problem at this low level of implementation.
8. Discuss the opportunity to use Sub-Capacity Workload License Charges with IBM and determine that it is a better license option than your current contract. If so, specify a time to convert to VWLC and change your contracts accordingly.
9. Monitor and adjust the LPAR Defined Capacities to maximize the benefit.
SG24-6522-11, September, 2004